Sniping game

ok, so i am creating a sniping game, and everything is going well so far. one problem is, you can shoot your target regardless of whether you are reloading. i made it so when you fire, a variable is set to true. after the firing and reloading sequence is finished, that variable is set to false. how can i make it so you can only kill your target when the variable is false?

edit: the guy you are trying to kill is a button, not a movie clip, because that was the only way i could make it so when you should hit, the animation goes to the next frame.